ISHS Acta Horticulturae 653: IX International Symposium on Plant Bioregulators in Fruit Production
EFFECTS OF AMINOETHOXYVINYLGLYCINE ON PREHARVEST DROP AND FRUIT QUALITY OF 'MIBAEKDO' PEACHES |
| Authors: | I.S. Kim, C.D. Choi, H.J. Lee, J.K. Byun |
| Keywords: | aminoethoxyvinylglycine, AVG, peach, preharvest drop, harvest date, fruit firmness, acidity, soluble solids, ethylene production |
| Abstract:
Various concentrations of aminoethoxyvinylglycine (AVG) were sprayed onto fruits and leaves around the fruits of 5-year-old peach (Prunus persica cv. Mibaekdo) trees at 3 and 4 weeks before the predicted harvest date. The AVG sprays greatly reduced preharvest fruit drop rate in a concentration-dependent manner. The AVG sprays at 3 weeks before the predicted harvest date appeared to be more effective than those at 4 weeks before the predicted harvest date. With AVG sprays at any spray time and the concentrations applied, the fruit harvest date was delayed by 3 days. At harvest date, the AVG-sprayed fruits had significantly higher weight than the control fruits. Furthermore, the AVG sprays tended to decrease fruit firmness and acidity, but increase soluble solids contents at harvest. These effects appeared to be associated with the suppression of the fruit respiration rate and ethylene production, since the AVG spray delayed the onset of respiration and ethylene production of the fruits. Thus, our results suggest that fruit harvest and storage could be regulated by appropriate use of AVG. | |
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